source: imaps-frontend/node_modules/enhanced-resolve/lib/util/path.js

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Last change on this file was 79a0317, checked in by stefan toskovski <stefantoska84@…>, 5 days ago

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[79a0317]1/*
2 MIT License http://www.opensource.org/licenses/mit-license.php
3 Author Tobias Koppers @sokra
4*/
5
6"use strict";
7
8const path = require("path");
9
10const CHAR_HASH = "#".charCodeAt(0);
11const CHAR_SLASH = "/".charCodeAt(0);
12const CHAR_BACKSLASH = "\\".charCodeAt(0);
13const CHAR_A = "A".charCodeAt(0);
14const CHAR_Z = "Z".charCodeAt(0);
15const CHAR_LOWER_A = "a".charCodeAt(0);
16const CHAR_LOWER_Z = "z".charCodeAt(0);
17const CHAR_DOT = ".".charCodeAt(0);
18const CHAR_COLON = ":".charCodeAt(0);
19
20const posixNormalize = path.posix.normalize;
21const winNormalize = path.win32.normalize;
22
23/**
24 * @enum {number}
25 */
26const PathType = Object.freeze({
27 Empty: 0,
28 Normal: 1,
29 Relative: 2,
30 AbsoluteWin: 3,
31 AbsolutePosix: 4,
32 Internal: 5
33});
34exports.PathType = PathType;
35
36const invalidSegmentRegEx =
37 /(^|\\|\/)((\.|%2e)(\.|%2e)?|(n|%6e|%4e)(o|%6f|%4f)(d|%64|%44)(e|%65|%45)(_|%5f)(m|%6d|%4d)(o|%6f|%4f)(d|%64|%44)(u|%75|%55)(l|%6c|%4c)(e|%65|%45)(s|%73|%53))?(\\|\/|$)/i;
38exports.invalidSegmentRegEx = invalidSegmentRegEx;
39
40const deprecatedInvalidSegmentRegEx =
41 /(^|\\|\/)((\.|%2e)(\.|%2e)?|(n|%6e|%4e)(o|%6f|%4f)(d|%64|%44)(e|%65|%45)(_|%5f)(m|%6d|%4d)(o|%6f|%4f)(d|%64|%44)(u|%75|%55)(l|%6c|%4c)(e|%65|%45)(s|%73|%53))(\\|\/|$)/i;
42exports.deprecatedInvalidSegmentRegEx = deprecatedInvalidSegmentRegEx;
43
44/**
45 * @param {string} p a path
46 * @returns {PathType} type of path
47 */
48const getType = p => {
49 switch (p.length) {
50 case 0:
51 return PathType.Empty;
52 case 1: {
53 const c0 = p.charCodeAt(0);
54 switch (c0) {
55 case CHAR_DOT:
56 return PathType.Relative;
57 case CHAR_SLASH:
58 return PathType.AbsolutePosix;
59 case CHAR_HASH:
60 return PathType.Internal;
61 }
62 return PathType.Normal;
63 }
64 case 2: {
65 const c0 = p.charCodeAt(0);
66 switch (c0) {
67 case CHAR_DOT: {
68 const c1 = p.charCodeAt(1);
69 switch (c1) {
70 case CHAR_DOT:
71 case CHAR_SLASH:
72 return PathType.Relative;
73 }
74 return PathType.Normal;
75 }
76 case CHAR_SLASH:
77 return PathType.AbsolutePosix;
78 case CHAR_HASH:
79 return PathType.Internal;
80 }
81 const c1 = p.charCodeAt(1);
82 if (c1 === CHAR_COLON) {
83 if (
84 (c0 >= CHAR_A && c0 <= CHAR_Z) ||
85 (c0 >= CHAR_LOWER_A && c0 <= CHAR_LOWER_Z)
86 ) {
87 return PathType.AbsoluteWin;
88 }
89 }
90 return PathType.Normal;
91 }
92 }
93 const c0 = p.charCodeAt(0);
94 switch (c0) {
95 case CHAR_DOT: {
96 const c1 = p.charCodeAt(1);
97 switch (c1) {
98 case CHAR_SLASH:
99 return PathType.Relative;
100 case CHAR_DOT: {
101 const c2 = p.charCodeAt(2);
102 if (c2 === CHAR_SLASH) return PathType.Relative;
103 return PathType.Normal;
104 }
105 }
106 return PathType.Normal;
107 }
108 case CHAR_SLASH:
109 return PathType.AbsolutePosix;
110 case CHAR_HASH:
111 return PathType.Internal;
112 }
113 const c1 = p.charCodeAt(1);
114 if (c1 === CHAR_COLON) {
115 const c2 = p.charCodeAt(2);
116 if (
117 (c2 === CHAR_BACKSLASH || c2 === CHAR_SLASH) &&
118 ((c0 >= CHAR_A && c0 <= CHAR_Z) ||
119 (c0 >= CHAR_LOWER_A && c0 <= CHAR_LOWER_Z))
120 ) {
121 return PathType.AbsoluteWin;
122 }
123 }
124 return PathType.Normal;
125};
126exports.getType = getType;
127
128/**
129 * @param {string} p a path
130 * @returns {string} the normalized path
131 */
132const normalize = p => {
133 switch (getType(p)) {
134 case PathType.Empty:
135 return p;
136 case PathType.AbsoluteWin:
137 return winNormalize(p);
138 case PathType.Relative: {
139 const r = posixNormalize(p);
140 return getType(r) === PathType.Relative ? r : `./${r}`;
141 }
142 }
143 return posixNormalize(p);
144};
145exports.normalize = normalize;
146
147/**
148 * @param {string} rootPath the root path
149 * @param {string | undefined} request the request path
150 * @returns {string} the joined path
151 */
152const join = (rootPath, request) => {
153 if (!request) return normalize(rootPath);
154 const requestType = getType(request);
155 switch (requestType) {
156 case PathType.AbsolutePosix:
157 return posixNormalize(request);
158 case PathType.AbsoluteWin:
159 return winNormalize(request);
160 }
161 switch (getType(rootPath)) {
162 case PathType.Normal:
163 case PathType.Relative:
164 case PathType.AbsolutePosix:
165 return posixNormalize(`${rootPath}/${request}`);
166 case PathType.AbsoluteWin:
167 return winNormalize(`${rootPath}\\${request}`);
168 }
169 switch (requestType) {
170 case PathType.Empty:
171 return rootPath;
172 case PathType.Relative: {
173 const r = posixNormalize(rootPath);
174 return getType(r) === PathType.Relative ? r : `./${r}`;
175 }
176 }
177 return posixNormalize(rootPath);
178};
179exports.join = join;
180
181/** @type {Map<string, Map<string, string | undefined>>} */
182const joinCache = new Map();
183
184/**
185 * @param {string} rootPath the root path
186 * @param {string} request the request path
187 * @returns {string} the joined path
188 */
189const cachedJoin = (rootPath, request) => {
190 /** @type {string | undefined} */
191 let cacheEntry;
192 let cache = joinCache.get(rootPath);
193 if (cache === undefined) {
194 joinCache.set(rootPath, (cache = new Map()));
195 } else {
196 cacheEntry = cache.get(request);
197 if (cacheEntry !== undefined) return cacheEntry;
198 }
199 cacheEntry = join(rootPath, request);
200 cache.set(request, cacheEntry);
201 return cacheEntry;
202};
203exports.cachedJoin = cachedJoin;
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